I believe imperialism because it means gaining on one country's power
Answer:
The invention of the printing press by Johannes Gutenberg.
Explanation:
The invention of the printing press by Johannes Gutenberg allowed new ideas to spread more quickly around Europe. The discovery of America by Columbus meant that new foods and medicines were brought back from the New World.
Choice A is wrong because only 26 presidents have served in the military.
Choice B is wrong because not all presidents have been governors.
Choice D is wrong since James Buchanan and Grover Cleveland were not married.
Therefore, Choice C is the correct answer.
The answer is B) by John C Calhoun giving in to Andrew Jackson.
While you didn't provide any possible sources, we can expect that biased information would be found when you would look for information from people who are involved in the situation that is being discussed. Imagine a soldier from Germany discussing his viewpoint of World War II. He would most likely give you a biased account. At least, when compared to a postwar historical analysis of that same situation.